結果
問題 | No.2844 Birthday Party Decoration |
ユーザー |
![]() |
提出日時 | 2024-08-24 17:00:20 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 4 ms / 2,000 ms |
コード長 | 1,173 bytes |
コンパイル時間 | 344 ms |
コンパイル使用メモリ | 45,952 KB |
最終ジャッジ日時 | 2025-02-24 00:39:34 |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 4 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:34:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 34 | scanf("%d", &tn); | ~~~~~^~~~~~~~~~~ main.cpp:39:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 39 | scanf("%d%lld", &n, &x); | ~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:40:38: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 40 | for (int i = 0; i < n; i++) scanf("%d", cs + i); | ~~~~~^~~~~~~~~~~~~~
ソースコード
/* -*- coding: utf-8 -*- * * 2844.cc: No.2844 Birthday Party Decoration - yukicoder */ #include<cstdio> #include<algorithm> #include<utility> using namespace std; /* constant */ const int MAX_N = 60; const int BN = 60; const long long LINF = 1LL << (BN + 1); /* typedef */ using ll = long long; using pll = pair<ll,ll>; /* global variables */ int cs[MAX_N]; pll ps[MAX_N + 1]; /* subroutines */ /* main */ int main() { int tn; scanf("%d", &tn); while (tn--) { int n; ll x; scanf("%d%lld", &n, &x); for (int i = 0; i < n; i++) scanf("%d", cs + i); ll r = x; int m = 0; for (int i = 0; i < n; i++) { ll bi = (1LL << cs[i]); if ((x & bi) == 0) { ll li = (x & ~(bi - 1)) - 1; ll ri = (x & ~(bi - 1)) | bi; if (li < 0) r = max(r, ri); else ps[m++] = {li, ri}; } } ll mind = LINF; if (m > 0) { sort(ps, ps + m); ps[m] = {x, x}; ll l = ps[0].first; mind = r - l; for (int i = 0; i < m; i++) { r = max(r, ps[i].second); l = ps[i + 1].first; mind = min(mind, r - l); } } else mind = r - x; printf("%lld\n", mind * 2); } return 0; }